Warrants - Summary of Periodic Changes in Fair Value of Warrant Liability (Detail) - USD ($)		3 Months Ended	9 Months Ended
Aug. 16, 2017	Sep. 30, 2017	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Issuance	$ (3,498,632)
Change in fair value		$ (508,316)	$ (508,316)
Fair Value, Inputs, Level 3 [Member] \| Common Stock Warrants [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Balance, beginning of period			0
Issuance			3,498,632
Change in fair value			508,316
Balance, end of period		$ 4,006,948	$ 4,006,948

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
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Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
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- Definition

Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.

+ References

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